* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    height: 100%;
}

body {
    height: 100%;
}

.top {
    background-color: aliceblue;
    min-height: 100%;
    width: 1200px;
    margin: 0 auto;
    padding: 100px;
}

.copyright {
    height: 80px;
    background-color: #acadad;
    margin-top: -80px;
    text-align: center;
}

.copyright > i {
    font-style: normal;
    line-height: 80px;
}